Karamba3D

Information

Karamba3D is a parametric structural engineering tool which provides accurate analysis of spatial trusses, frames and shells.

Current Version: 1.3.2 (July 9 2019)

Website: http://www.karamba3d.com
Location: Vienna
Members: 1119
Latest Activity: Oct 6

Karamba3D is an interactive, parametric finite element program. It lets you analyze the response of 3-dimensional beam and shell structures under arbitrary loads.

Karamba3D is being developed by Clemens Preisinger in cooperation with Bollinger und Grohmann ZTGmbH in Vienna.

Download a free trial now! Licenses for educational or commercial purposes can be purchased at www.karamba3d.com/buy.

downloads, manual:

https://manual.karamba3d.com/ or

www.food4rhino.com/app/karamba3d

examples (for Karamba3D 1.3.2):

www.karamba3d.com/examples/

release notes:
www.grasshopper3d.com/group/karamba3d/page/new-features-and-bug-fixes

scripting guide & examples:

https://www.karamba3d.com/download/#manual

repository with unit tests:

https://github.com/karamba3d/K3D_tests

Here a beam structure based on stream-lines with bending moments:

More details, manual, examples and download ....

This grasshopper discussion forum is no longer maintained - please post all questions on the McNeel Forum. Thank you

Discussion Forum

Modelling prestressed concrete / tendons in Karamba 5 Replies

Hi everybody,I am trying to model a prestressed ruled surface shell with tendons in karamba, my first approach was defining the tendons as beams, prestressing them with initial strain and then adding…Continue

Started by Max Dombrowski. Last reply by Michael Dubby Oct 6.

The Ridge Wallet warranty question 3 Replies

Is it easy to get a replacement under The Ridge Wallet’s warranty if something breaks?Continue

Started by yogamaja. Last reply by Aaron Delatorre Sep 26.

Tensegrity roof 2 Replies

Hello everyone! I'm working on a tensegrity structure relatively simple, which is composed by compressed beams that never touch eachothers, and tense cables. This case-structure has been built, so it…Continue

Started by David Ra. Last reply by Michael Dubby Sep 10.

Disney Channel streaming issues 5 Replies

Has anyone had problems with Disney Channel streaming not working on their TV? What’s the best way to fix it?Continue

Started by yogamaja. Last reply by Michael Dubby Aug 15.

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Comment Wall

Comment

You need to be a member of Karamba3D to add comments!

Comment by Andrei Raducanu on April 18, 2015 at 3:03pm: What I don't get is why in the simply supported plate and beam examples one of the ends doesn't move horizontally when the beam/plate gets bent.

It does have the freedom to do so and in order to keep the length constant it should do so, yet it doesn't. Please answer if You can

Comment by Andrei Raducanu on April 18, 2015 at 9:44am: Can curved folding simulations be done using Karamba?
Something along these lines :

Comment by Karamba3D on April 15, 2015 at 12:03am: Elisa, you could try to place two elements in the same spot. One with, one without eccentricity and add corresponding loads to them.

Best, C.

Comment by Elisa Cheung on April 14, 2015 at 3:27pm: Clemens,

Thanks for your response. However, I'm still having trouble with the ecce-loc. I want to change ONLY the eccentricity of the prestress load , and not offset the other uniform loads. Is there a way to do that?

Comment by Karamba3D on April 13, 2015 at 11:45pm: Hi Elisa,

in Karamba 1.1.0 the post-tension load is attached to the eccentric beam element (see PreTensionLoad_EccentricBeam.gh).

The trapezoid cross section is filled (when rendered it looks hollow though). The box cross section is hollow.

Best,

Clemens

Comment by Elisa Cheung on April 13, 2015 at 6:33pm: Hey guys, I'm having two issues.

Is there any way to change the eccentricity of the post-tension load? I changed the ecce-loc input but that only changes the centroid of where the point load acts -- the post-tension load seems to be unaffected.

2. How do I get a filled trapezoid cross section? It appears to be hollow at the moment.

Thanks for your help in advance!

Comment by Nicholas Rawitscher on March 31, 2015 at 11:58am: Hey guys! do you know where to find the "point-load" component in the latest version of Karamba? thank you for your help

Comment by Karamba3D on January 8, 2015 at 11:14pm: Leonardo:

in Karamba 1.0.5 the cross section optimization algorithm only considers normal forces for buckling. The next version (Karamba 1.1.0) takes full account of the EC3 formulas including lateral torsional buckling and interaction values according to annex B.

Best,

Clemens

Comment by Leonardo on January 8, 2015 at 3:53pm: Clemens, thanks for your quick answer.

I have carefully read the appendix and the way for calculating the buckling length is clear. However I have still one questions:

seems to be that adopting Eurocode3 (eq. 6.47) only the normal forces are compared with the critical buckling load. Am I right?

Can we want take into account both, bending and axial compression, as suggested by Eurocode3 (Eq. 6.3.3)?

Many thanks,

Leonardo

Comment by Karamba3D on January 7, 2015 at 11:02pm: Hi Leonardo,

the Cross Section Optimization component takes into account buckling for members (see the appendix of the Karamba manual). The assumed buckling length is the distance between two nodes that connect to more than three beams or to a support or double that distance in case one end is free. The buckling lengths can be set manually via the 'ModifyBeam'-component.
If you have 'huge' bending moments in your structure then buckling will have little effect on the result.

Sometimes so called global buckling can govern a design (think e.g. of a compressed girder of a truss structure). In such cases one has to guess the buckling length or do a buckling analysis (which will be possible in Karamba 1.1.0).

Best,

Clemens